From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk1-x735.google.com (mail-qk1-x735.google.com [IPv6:2607:f8b0:4864:20::735]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 298163B29E; Mon, 8 Oct 2018 01:06:48 -0400 (EDT) Received: by mail-qk1-x735.google.com with SMTP id q5-v6so11351999qki.6; Sun, 07 Oct 2018 22:06:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=nDAsna/Fuz3Ubs8aH4cH4yQcJcgGmbkwY+ifDiN5Rc4=; b=E+y6JHDcSVpOAZuBLQzPfrtOQYwVjoefeze7DDdVmceTl2QnUUm1dGWVurObLI96OY /eFj9bFxajJFxoQ0woc4zaKqEtH4CEHbekpwSiLZOErt4jeQwbeesqmVbRSAsWc8MBi+ +R/AccrnXZMh2LFwFrjDueYclP+qUodMQgPJNpoe/rOmMWImz+qJXAK//LVt7tuMKhxI ocpWPMGyUHFUFyX2a3hssK/pLgDvZ7ZBHU+zeRVmnNYe44ixQy/oQiN5o34z92uLdMxB HEE2Hpe2vgl68LA5l6HzSpinxAexB1pFIO7SUVBsNqOP/+78V8lLGy6hKP1KZuBIJK7V EhkQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=nDAsna/Fuz3Ubs8aH4cH4yQcJcgGmbkwY+ifDiN5Rc4=; b=IuvzUIwax53k1DaEuvC6Xlj1CXr8IGuAgjUBat2cIExKrCshKAu8Toq0zyul0pev5z pfvFEHnwoe6SotY8MLE47qgMi3o9ffmBMdyKdeec/BbI1lbWrp7Dz3XzpKqjw6Rp/vHP ziWKeKi5QfcatqYqMZDmqz7Sm6IGHiimqZOjuPs9vUocSDB08xEvJyKUVsFalpXG3O05 VVWAEs7azjoiQs96+P8k5g7jm8syn6LxofvwkyhejykymIx+q4ImAT+ghJz2qvUahZk3 IgrjnqwzF3VAJAO0iPxMlryUN0rCyMzdpNcbT+lBDGuomYHrMu5eEUHwFTlCobnvvp7s m/kg== X-Gm-Message-State: ABuFfojr5SO6Ky3Pl37bBbHKUP3RhvB0WLYiboWiS5A+XyM3eACIG6lK 5N+vJ2IUZ10TMjYoGTwvUBhDBeGcWu4P+xhONYoEJlHK X-Google-Smtp-Source: ACcGV60PYVt5294/m9jX5jUabZEa/0nJ4cxZrIBUzEOjH5ktpOV5J4BUqLxNmj7HNDK4Zu7bUvsSg2hcwr9l+wYvhDc= X-Received: by 2002:a37:b683:: with SMTP id g125-v6mr12926955qkf.179.1538975207711; Sun, 07 Oct 2018 22:06:47 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Dave Taht Date: Sun, 7 Oct 2018 22:06:35 -0700 Message-ID: To: ruben@vfn-nrw.de Cc: Cake List , ecn-sane@lists.bufferbloat.net Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Ecn-sane] [Cake] Status of sch_cake and sctp with ECN X-BeenThere: ecn-sane@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussion of explicit congestion notification's impact on the Internet List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Oct 2018 05:06:48 -0000 On Sun, Oct 7, 2018 at 9:46 PM Ruben wrote: > > Hey guys, > > I googled this but I found no answers. RFC4960 (the sctp RFC) is mentioni= ng ECN, but just in the appendix. I was wondering if the Linux library has = ECN support, and how one might active it (as socket option or as system set= ting?) Pretty good question. The added reliability of ecn would benefit sctp applications. There's two ways to get sctp out of linux, the kernel way and a userspace way. Kernel I thought was the most common. Netperf has support for it. 4+ years back I'd mostly tested sctp over ipv6 and at least from the kernel code in net/sctp/ipv6 it appears to mark packets as ecn capable, but I wasn't looking at the time. whether the congestion control in sctp is currently working worth a damn, don't know. So I can quickly setup a server to test this over ipv6 this week. >and if this tags are currently supported to be handled by sch_cake? ecn capability is a property of any protocol built on top of ip, tcp, udp, sctp, udp_lite, etc. > Hope someone got a bit more overview about this, than me, without digging= into code documentations. > > Thanks in advance! > > > Best regards > > Ruben > _______________________________________________ > Cake mailing list > Cake@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cake --=20 Dave T=C3=A4ht CTO, TekLibre, LLC http://www.teklibre.com Tel: 1-831-205-9740